/*
 * Copyright 2007 Rob Nielsen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 	http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.googlecode.proxymatic.core.engine;

import com.googlecode.proxymatic.core.MethodInvoker;
import com.googlecode.proxymatic.core.MethodSpec;
import com.googlecode.proxymatic.core.ProxyConfiguration;

import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;

public class JavaProxyInvocationHandler implements InvocationHandler, Serializable {
    private final ProxyConfiguration proxyConfiguration;
    private final MethodExecutor methodExecutor = new MethodExecutor();

    public JavaProxyInvocationHandler(ProxyConfiguration proxyConfiguration) {
        this.proxyConfiguration = proxyConfiguration;
    }

    public Object invoke(Object object, Method method, Object[] objects) throws Throwable {
        MethodInvoker handler = proxyConfiguration.getMethodHandlerMap().get(new MethodSpec(method));
        if (handler == null) {
            throw new IllegalStateException("No method handler registered for " + method + ". This should have been picked up by the ProxyBuilder!");
        }
        return methodExecutor.invokeMethod(handler, method, objects, proxyConfiguration);
    }

    public ProxyConfiguration getProxyConfiguration() {
        return proxyConfiguration;
    }
}
